Abstract
The effects of the hydration level of the photosynthetizing tissue on the rate of CO2 assimilation can, in principle, be three:
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1.
Water stress causing, at supraoptimal W.S.D. [according to Stålfelt’s terminology (1965)], hydroactive closure of the stomata, thereby decreasing their diffusibility and as a result of this causing a deterioration in the CO2 supply of the leaf mesophyll. The relative effect of this closure is greatest when the apertures of the stomata are small.
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2.
Hydration of the cytoplasmatic ultrastructure in which photosynthetic processes take place, has a direct effect on the enzymatic activity of photosynthesis.
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3.
Hydration of the cuticle, the epidermal cells and the cell membrane of the intercellular cells decreases their permeability for CO2, resp. HCO2 ions and thus again the supply of green cells with CO2.
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Slavík, B. (1965). The Influence of Decreasing Hydration Level on Photosynthetic Rate in the Thalli of the Hepatic Conocephallum Conicum. In: Slavík, B. (eds) Water Stress in Plants. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-3593-4_19
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DOI: https://doi.org/10.1007/978-94-010-3593-4_19
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